greenplumn CDXLLogicalSelect 源码
greenplumn CDXLLogicalSelect 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLLogicalSelect.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CDXLLogicalSelect.h
//
// @doc:
// Class for representing DXL logical select operators
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLLogicalSelect_H
#define GPDXL_CDXLLogicalSelect_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLLogical.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLLogicalSelect
//
// @doc:
// Class for representing DXL Logical Select operators
//
//---------------------------------------------------------------------------
class CDXLLogicalSelect : public CDXLLogical
{
private:
public:
CDXLLogicalSelect(CDXLLogicalSelect &) = delete;
// ctor/dtor
explicit CDXLLogicalSelect(CMemoryPool *);
// accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLLogicalSelect *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopLogicalSelect == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLLogicalSelect *>(dxl_op);
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *, BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLLogicalSelect_H
// EOF
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